101在检索框中添加一个书签按钮（扩展知识：在检索框中添加一个范围条）

效果如下：

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UITableViewController<UISearchBarDelegate>
@property (strong, nonatomic) UISearchBar *searchBar;
@property (strong, nonatomic) NSMutableArray *mArrDataSourceOfTableView;
@property (strong, nonatomic) NSMutableArray *mArrDataSourceOfSearchBar;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()
- (void)layoutUI;
- (void)loadNavigation;
- (void)loadData;
- (void)updateTableView:(NSString *)searchText;
- (void)showAlert:(NSString *)msg;
@end

@implementation ViewController
#define kCount 64

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self layoutUI];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:animated];
    [self.navigationController setToolbarHidden:YES animated:animated];
}

#pragma mark - Private Methods
- (void)layoutUI {
    [self loadNavigation];
    
    [self loadData];
    
    _searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 50)];
    _searchBar.delegate = self;
    //_searchBar.prompt = @"数字查询";
    _searchBar.placeholder = @"请输入0-63之间的数字";
    _searchBar.keyboardType = UIKeyboardTypeNumberPad;
    _searchBar.barStyle = UIBarStyleDefault;
    _searchBar.tintColor = [UIColor blackColor];

    _searchBar.showsBookmarkButton = YES; //是否显示书签按钮；默认值是NO
    
    _searchBar.scopeButtonTitles = @[@"1", @"2", @"3", @"4", @"5"];
    _searchBar.showsScopeBar = YES; //是否显示范围条；默认值是NO
    _searchBar.selectedScopeButtonIndex = -1;
    
    [_searchBar sizeToFit]; //设置宽高大小自适应
    self.tableView.tableHeaderView = _searchBar;
    
}

- (void)loadNavigation {
    self.navigationItem.title = @"在检索框中添加一个书签按钮";
}

- (void)loadData {
    _mArrDataSourceOfTableView = [[NSMutableArray alloc] initWithCapacity:kCount];
    _mArrDataSourceOfSearchBar = [[NSMutableArray alloc] initWithCapacity:kCount];
    for (NSInteger i=0; i<kCount; i++) {
        [_mArrDataSourceOfTableView addObject:[NSString stringWithFormat:@"%ld", (long)i]];
        _mArrDataSourceOfSearchBar[i] = _mArrDataSourceOfTableView[i];
    }
}

- (void)updateTableView:(NSString *)searchText {
    [_mArrDataSourceOfSearchBar removeAllObjects];
    if (searchText.length == 0) {
        _mArrDataSourceOfSearchBar = [[NSMutableArray alloc] initWithArray:_mArrDataSourceOfTableView];
    } else {
        for (NSString *item in _mArrDataSourceOfTableView) {
            if ([item hasPrefix:searchText]) {
                [_mArrDataSourceOfSearchBar addObject:item];
            }
        }
    }
    //表格视图tableView更新
    [self.tableView reloadData];
}

- (void)showAlert:(NSString *)msg {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示信息"
                                                    message:msg
                                                   delegate:self
                                          cancelButtonTitle:nil
                                          otherButtonTitles:@"确定", nil];
    [alert show];
}

#pragma mark - SearchBar
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
    [self updateTableView:searchText];
    
    searchBar.selectedScopeButtonIndex = -1;
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    [self updateTableView:searchBar.text];
    //隐藏键盘
    [_searchBar resignFirstResponder];
    
    searchBar.selectedScopeButtonIndex = -1;
}

- (void)searchBarBookmarkButtonClicked:(UISearchBar *)searchBar {
    [self showAlert:@"点击了书签按钮"];
}

- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {
    //selectedScope = searchBar.selectedScopeButtonIndex
    NSString *selectedScopeTitle = searchBar.scopeButtonTitles[selectedScope];
    NSString *msg = [NSString stringWithFormat:@"点击了范围条；选中的项索引位置=%ld，选中的项值=%@",
                     (long)selectedScope,
                     selectedScopeTitle];
    [self showAlert:msg];
    
    searchBar.text = selectedScopeTitle;
    [self updateTableView:searchBar.text];
    
    //从 UISearchBar 中获取到其对应的 UITextField 对象实例
    UITextField *txtSearch = [searchBar valueForKey:@"_searchField"];
    NSLog(@"txtSearch.text: %@, searchBar.text: %@ 值一样", txtSearch.text, searchBar.text);
}

#pragma mark - TableView
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [_mArrDataSourceOfSearchBar count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *cellIdentifier = @"cellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    cell.textLabel.text = _mArrDataSourceOfSearchBar[indexPath.row];
    return cell;
}

@end

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UINavigationController *navigationController;

@end

AppDelegate.m

#import "AppDelegate.h"
#import "ViewController.h"

@interface AppDelegate ()
@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    ViewController *viewController = [[ViewController alloc] init];
    _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
    _window.rootViewController = _navigationController;
    //[_window addSubview:_navigationController.view]; //当_window.rootViewController关联时，这一句可有可无
    [_window makeKeyAndVisible];
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
}

- (void)applicationWillTerminate:(UIApplication *)application {
}

@end